New Delhi, Oct. 17 -- As the capital city prepares to celebrate Diwali, Delhi's air quality continued to remain in the 'poor' category for the fourth consecutive day on Friday, October 17, reeling under rising pollution levels.

According to the Central Pollution Control Board (CPCB), the national capital recorded an Air Quality Index (AQI) of 254 at 4 pm, placing it in the 'poor' category.

According to the CPCB, an AQI between zero and 50 is considered 'good', 51 to 100 'satisfactory', 101 to 200 'moderate', 201 to 300 'poor', 301 to 400 'very poor', and 401 to 500 'severe'.

Out of the 38 monitoring stations in the capital, five reported air quality in the 'very poor' category.

Among them, Anand Vihar recorded the highest AQI at 382, ...